code: def _flatten_list(nested_list):
      return [item for sublist in nested_list for item in sublist]
  
imports: import math
  import numpy
  import mxnet
  from ..device import current_device
  from ..random import uniform
  from ..base import _as_list
  from .None import ndarray
label_desc: Use image node_id 1 for calling a global function with example usage: _flatten_list(nested_list) and returns: unknown